4 Drives In Raid 1

Raid 1 consists of at least two drives so four drives are acceptable.

4 drives in raid 1. Select 3 4 create another raid 1. In addition to that it also stores parity information of all the disks in a separate dedicated disk to achieve redundancy. Either way you can loose a drive and still work.

Raid 4 stripes the data across multiple disks just like raid 0. In the diagram below disk 4 serves as the parity disk having parity blocks a p b p c p and d p. So if one of the disks fails the data can be.

This type of array has excellent performance where the write and read speed is high. September 3 2017 at 941 pm. The data distribution mechanism here is mirroring.

Upon failure of a single drive subsequent reads can be calculated from the distributed parity such that no data is lost. Raid 1 for one and two hdd another raid 1 for 3 and 4 hdd can be done. 4 drives of 3 tb in raid 10 is 6 tb.

Raid 5 consists of block level striping with distributed parity. To do this need to disable xraid delete the volume created make sure you have a backup of your data before doing this. It requires that all drives but one be present to operate.

Select 1 2 hdd give a volume name create. All 5 drives for the raid 1 with every drive as exact copy of other drives mirror example 3 drives and use the other two disks as spare if one of the first 3 disks fails the 4th will take his place. 4 drives of 3 tb in raid 1 is 3 tb one drive with data and three drives that are copies of the data.

The data distribution mechanism here is mirroring. Raid 1 is mirroring normally with two disks with 4 i would go raid 10 which is a raid 0 mirrored by a raid 1 you will get 1gb of storage.